Question

Examine the following unbalanced chemical equation: CO2 + C → CO. Which of the following is the correctly balanced form of this equation?

A. CO2 + C → 2CO
B. CO2 + C → C2O
C. CO2 + C2 → CO
D. 2CO2 + C → CO

Answer 1

CO2+C---> 2CO, is the answer

Answer 2

The right answer is A.

Named after the chemist Octave Leopold Boudouard (1872-1923), the balance of Boudouard corresponds to the reduction of carbon dioxide (of air) by solid carbon into gaseous carbon monoxide:

C (s) + CO2 (g) ==> 2 (CO) (g)

This is a redox reaction, more precisely disproportionation (carbon monoxide plays both the role of oxidizer and reducer).